I see in http://kb.mozillazine.org/Safe_Mode#Safe_Mode_options the "Reset toolbars and controls" option is described like this: Reset toolbars and controls (Firefox, Thunderbird) or Reset toolbars and window sizes (SeaMonkey) - Removes any toolbar customizations you may have made via the "Customize Toolbar" dialog. Also restores default window size/position and tree sort order and resolves various localstore corruption issues .

This article covers other problems caused by a [http://kb.mozillazine.org/Corrupt_localstore.rdf corrupt localstore.rdf] file, not just toolbars being reset. See [[Firefox window is too large or opens off screen]] which is archived ... but it was the solution to this recent question:
* https://support.mozilla.org/en-US/questions/918500 browser window opening off screen
I see in http://kb.mozillazine.org/Safe_Mode#Safe_Mode_options the "Reset toolbars and controls" option is described like this: ''Reset toolbars and controls (Firefox, Thunderbird) or Reset toolbars and window sizes (SeaMonkey) - Removes any toolbar customizations you may have made via the "Customize Toolbar" dialog. Also restores default window size/position and tree sort order and resolves various localstore corruption issues'' .
I think we should rename this article to something like, <br> "Toolbar changes or window settings are not saved" <br>
... and then redirect [[Firefox window is too large or opens off screen]] to this article.
In any case, I think that [[Firefox window is too large or opens off screen]] should be unarchived and redirected here.